Android 設定預設鎖屏桌布介面
阿新 • • 發佈：2018-12-14
完成自定義service後,接下來就是具體實現介面
1,在frameworks/base/core/java/android/app/customized/ICustomizedService.aidl中定義介面
boolean setLockScreenWallpaper(String uri);2,在frameworks/base/core/java/android/app/customized/CustomizedManager.java中實現介面
package android.app.customized; import android.util.Log; import android.content.Context; import android.content.Intent; import android.os.Binder; import android.os.RemoteException; import android.provider.Settings; import java.io.IOException; import android.os.ServiceManager; import android.os.IBinder; import java.util.List; import android.app.ActivityManager; import android.graphics.Bitmap; public class CustomizedManager{ private static final String TAG="CustomizedManager"; private static final boolean DBG=true; private static ICustomizedService mService; private final Context mContext; public CustomizedManager(Context context){ mContext = context; mService = ICustomizedService.Stub.asInterface( ServiceManager.getService("customized")); } private static ICustomizedService getService(){ if (mService != null) { return mService; } IBinder b = ServiceManager.getService("customized" mService = ICustomizedService.Stub.asInterface(b); return mService; } public boolean setLockScreenWallpaper(String uri) { try { getService().setLockScreenWallpaper(uri); } catch (RemoteException e) { } return false; } }
3,在frameworks/base/services/core/java/com/android/server/customized/CustomizedService.java中對AIDL檔案中定義的介面進行具體實現.
package com.android.server.customized; import android.os.IBinder; import android.os.ServiceManager; import android.content.Context; import android.content.Intent; import android.os.Binder; import android.app.customized.ICustomizedService; import android.content.BroadcastReceiver; import android.view.IWindowManager; import android.view.WindowManagerGlobal; import android.graphics.BitmapFactory; public class CustomizedService extends ICustomizedService.Stub { private static final String TAG = "CustomizedService "; private Context mContext; public static class Lifecycle extends SystemService { private CustomizedService mService; public Lifecycle(Context context) { super(context); } @Override public void onStart() { mService = new CustomizedService (getContext()); publishBinderService(Context.CUSTOMIZED, mService); } @Override public void onBootPhase(int phase) { } @Override public void onUnlockUser(int userHandle) { } } public CustomizedService (Context context) { mContext = context; } public boolean setLockScreenWallpaper(String uri) { if (uri == null || "".equals(uri)) return false; File file = new File(uri); if (!file.exists()) { return false; } Log.d(TAG, "setLockScreenWallpaper uri===============" + uri); long ident = Binder.clearCallingIdentity(); Intent sendlock = new Intent(); String packageName = "com.android.launcher3"; String serviceClassName = packageName + ".LockScreenWallPaperService"; sendlock.putExtra("path", uri); sendlock.setComponent(new ComponentName(packageName, serviceClassName)); mContext.startServiceAsUser(sendlock, UserHandle.OWNER); Binder.restoreCallingIdentity(ident); return true; } }
4, 在packages/apps/Launcher3/AndroidManifest.xml中註冊LockScreenWallPaperService
<service android:name="com.android.launcher3.LockScreenWallPaperService" android:exported="true" > <intent-filter> <action android:name="com.android.launcher.action.SET_LOCKSCREENWALLPAPER_SERVICE" /> </intent-filter> </service>
5,因為我們只是在CustomizedService 中呼叫setLockScreenWallpaper方法啟動LockScreenWallPaperService,所以設定預設wallpaper還是要由setLockScreenWallpaper實現的.下面要實現LockScreenWallPaperService了,路徑為
packages/apps/Launcher3/src/com/android/launcher3/LockScreenWallPaperService.java
package com.android.launcher3;
import android.app.Service;
import android.os.*;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.content.Context;
import android.content.Intent;
import android.graphics.Matrix;
import android.util.Log;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
public class LockScreenWallPaperService extends Service {
private String TAG = "LockScreenWallPaperService";
private String path = "";
@Override
public void onCreate() {
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
Log.d(TAG, "onStartCommand ");
if (intent != null) {
path = intent.getStringExtra("path");
}
Bitmap bitmap = BitmapFactory.decodeFile(path);
SavePicToLocal savePic = new SavePicToLocal(bitmap);
savePic.execute("save picture");
return START_STICKY;
}
public boolean dumpBitmap(Bitmap mBitmap) throws FileNotFoundException {
Log.d(TAG, "dumpBitmap");
boolean flagSaveCompelete = false;
Bitmap bitmap_land, bitmap_port;
int height = mBitmap.getHeight();
int width = mBitmap.getWidth();
int lswidth = 1920;
int lsheight = 1200;
float lper = Math.max((float) lswidth / (float) width, (float) lsheight
/ (float) height);
if (lper > 1) {
Matrix lmatrix = new Matrix();
lmatrix.postScale(lper, lper);
bitmap_land = Bitmap.createBitmap(mBitmap,
(int) ((mBitmap.getWidth() - lswidth / lper) / 2),
(int) ((mBitmap.getHeight() - lsheight / lper) / 2),
(int) (lswidth / lper), (int) (lsheight / lper), lmatrix,
true);
} else {
bitmap_land = Bitmap.createBitmap(mBitmap,
(int) ((mBitmap.getWidth() - lswidth) / 2),
(int) ((mBitmap.getHeight() - lsheight) / 2), lswidth,
lsheight, null, true);
}
int pswidth = 1200;
int psheight = 1920;
float pper = Math.max((float) pswidth / (float) width, (float) psheight
/ (float) height);
if (pper > 1) {
Matrix pmatrix = new Matrix();
pmatrix.postScale(pper, pper);
bitmap_port = Bitmap.createBitmap(mBitmap,
(int) ((mBitmap.getWidth() - pswidth / pper) / 2),
(int) ((mBitmap.getHeight() - psheight / pper) / 2),
(int) (pswidth / pper), (int) (psheight / pper), pmatrix,
true);
} else {
bitmap_port = Bitmap.createBitmap(mBitmap,
(int) ((mBitmap.getWidth() - pswidth) / 2),
(int) ((mBitmap.getHeight() - psheight) / 2), pswidth,
psheight, null, true);
}
Matrix matrix = new Matrix();
matrix.postScale(0.5f, 0.5f);
bitmap_land = Bitmap.createBitmap(bitmap_land, 0, 0,
bitmap_land.getWidth(), bitmap_land.getHeight(), matrix, true);
bitmap_port = Bitmap.createBitmap(bitmap_port, 0, 0,
bitmap_port.getWidth(), bitmap_port.getHeight(), matrix, true);
flagSaveCompelete = saveBitmapToFile(
bitmap_port,
"/data/local/tmp/lockscreenwallpaper/keyguard_wallpaper_land.png",
1);
flagSaveCompelete = saveBitmapToFile(
bitmap_land,
"/data/local/tmp/lockscreenwallpaper/keyguard_wallpaper_port.png",
2);
return flagSaveCompelete;
}
private boolean saveBitmapToFile(Bitmap bitmap, String path, int isRecycle)
throws FileNotFoundException {
Log.d(TAG, "saveBitmapToFile ident=" + "bitmap" + bitmap);
boolean result = false;
if (bitmap == null)
return result;
Bitmap tmpbm = null;
java.io.FileOutputStream tmpfos = null;
try {
tmpbm = bitmap;
tmpfos = new java.io.FileOutputStream(path);
tmpbm.compress(Bitmap.CompressFormat.PNG, 100, tmpfos);
Log.d(TAG, "saveBitmapToFile compress");
} catch (FileNotFoundException ex) {
Log.d(TAG, "ex1" + ex);
throw ex;
} catch (java.io.IOException ex) {
Log.d(TAG, "ex2" + ex);
ex.printStackTrace();
} finally {
if (tmpfos != null) {
try {
Log.d(TAG, "tmpfos.close() ");
tmpfos.close();
result = true;
} catch (java.io.IOException ex) {
Log.d(TAG, "ex3" + ex);
}
}
if (tmpbm != null && !tmpbm.isRecycled())
if (isRecycle == 2) {
tmpbm.recycle();
}
}
return result;
}
class SavePicToLocal extends AsyncTask<String, Integer, Boolean> {
Bitmap bitmap;
public SavePicToLocal(Bitmap mBitmap) {
bitmap = mBitmap;
}
@Override
protected Boolean doInBackground(String... params) {
return dumpBitmaps();
}
private boolean dumpBitmaps() {
boolean flag = false;
try {
flag = dumpBitmap(bitmap);
flag = true;
} catch (FileNotFoundException e) {
}
return flag;
}
@Override
protected void onPostExecute(Boolean result) {
if (result) {
sendBroadcast(new Intent(
"android.intent.action.UPDATE_LOCK_WALLPAPER"));
Log.d(TAG, "send UPDATE_LOCK_WALLPAPER");
}
}
@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
}
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
}
然後編譯一下,就可以通過介面設定預設桌面了,大功告成~